Avaliação da qualidade da água do rio Marreco e proposta de monitoramento para controle dos impactos

Abstract

The need for care with the preservation and monitoring of water resources to guarantee survival is essential. One of the most important notes of the society is the exacerbated growth of the population, which causes an increase in the generation of the domestic fluids, industrial fluids generation, and decrease the special class of hydrous accessibility.The objective of the study was to verify through physical-chemical, biological and toxicological tests the water quality of Arroio Marreco. The water samples were collected at three different points with water pollution potential of the Marreco River. The analyzes carried out were pH, OD, water temperature, turbidity, total solids, DBO, DQO, surfactants, toxicity and thermotolerant coliforms. The results obtained contributed to establish a proposal of minimization and indication of possible causes of contamination. For the statistical analyses were used analyses of variance and Tukey’s Test, both with 5% of significance. The obtained results of the DQO, surfactants and thermo tolerant coliforms analyses remained over the limit established by the present law, requiring constant monitoring to determine the possible causes of the contamination, in this way the modified PAR is used as a tool for the application by local residents.